Machine for straightening round stock



June 28, 1932. A. P. DIESCHER MACHINE FOR STRAIGHTENING ROUND STOCK 5 Sheets-Sheet 1 mm mv 3. av 0 Sn 3 W 3 on w NW 3% m H r I R A Am H w m. 1 r k I W E MN mu NH mm H l .3 mN m o ww Pu H mm Pu iiii t {I 1 L wm Q P mm MM; w

wmusssss June 28, 1932.

WITNESSES mafmem 67m A. P. DIESCHER MACHINE FOR STRAIGHTENING ROUND STOCK Filed March 18, '1950 3 Sheets-Sheet 2 INVENTOR MW flzwaa lfi/imy m June 1932 A. P. DlESCHER,

MACHINE FOR STRAIGHTENING ROUND ST OCK Filed March 18, 1930 6 Sheets-Sheet 3 vyrm'sssEs Patented June 28, 1932 UNITED STATES PATENT OFFICE AUGUST 1, DIESCHER, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO S. DIESCHER & SONS, OF PITTSBURGH, PENNSYLVANIA, A PARTNERSHIP CONSISTING OF SAIUEL E. DIESCH'ER AND AUGUST P. DIESCHER MACHINE FOR STRAIGHTENING BOUND STOCK Application filed March 18, 1930. Serial no. 486,715.

This invention pertains to cross rolling machines for straightening round stock such as rods, pipes, shafts, and articles of that character, and relates more particularly to machines of the type employing two or more spaced sets of cooperating concave straightening rolls having a pressure roll or rolls mounted between them, the axes of the rolls on the opposite sides of the roll pass being inclined at angles to each other and to the center line of the roll pass, and the rolls on the one side of the pass being driven to rotate the stock and thereby advance it through the machine.

I In straightenin machines of this character now employe by pipe and other round stock manufacturing concerns the dead or idler rolls are usually adjustably mounted to permit the use of the machines for straightening stock of different sizes. In these machines the rolls are usually so mounted that each time they are thus adjusted the elevation of the lower edge of the pass, or in other words, the line of support of the stock in the machine, is changed. Due to this, either the conveyor tables employed for feeding the stock to and carrying it from the machine, or else the machine itself, or both, have to be adjusted to suit each difi'erent size of stock, in order for the stock to be fed to and removed from the machines in the correct alignment. To rovide for this, the conveyor tables are a justably mounted on screw jacks or the like, which is not a very substantial form of construction, or as desirable as tables which are firmly fixed to their base. In addition to this where different sizes of runs are made at comparatively close intervals such resetting of the tables is very objectionable because of the labor and time consumed in the operation.

The reason the adjustment of the rolls causes a variation in the line of support of the stock in the machine for each variation in size of roll pass is that the adjustable rolls are usually mounted in such a way that they can be moved only along a horizontal plane, or in. some similar manner which maintains the horizontal center line of the roll pass at approximately a fixed elevation. Hence, the

elevation of the lower edge of the roll pass, or, in other words, the line of support of the stock through the machine, is varied directly as the radius of the pass.

The primary object of this invention is to provide a cross rolling type of straightening machine of the above described character in which provision is made for eliminating the noted disadvantages common to the present machines.

It is a feature of the invention to attain this object by providing means for so adjusting the straightening rolls in the machine that the lower edge of the roll pass, or the line of support of the stock throu h the rolls, is maintained at a fixed elevation or all variations in the size of the roll pass, thus making it possible to use feeding and run-out tables which may be fixedly mounted on their sup p(i1f'ts in the same manner as the machine itse Another object is to provide a straightening machine of the type described, which is of relatively simple construction, and is capable of being manufactured in a sturdy, dependable form at a comparatively low cost.

These and other objects, as well as the novel features and advantages of the invention, will become more apparent when the following detailed description is read in conjunction with the accompanying drawings, of which Fig. 1 is a plan view of a straightening machine for straightening round stock which is constructed in accordance with the invention; Fig. 2 a sectional view of the same machine taken substantially on the broken line II-II of Fig. 1; Fig. 3 an elevational View of an adjustable idler roll support; Fig. i a schematic view showing the roll pass formed by the cooperating straightening rolls, indicating in dotted lines the manner in which the rolls are adjustable for operation on difierent sizes of stock; and Fig. 5 a View similar to Fig. 4 showing a variation in roll adjustment.

Referring now to the drawings, and more particularly to the embodiment of the invention illustrated in Figs. 1 to 4, inclusive, the frame or base 1 of the machine is adapted to be bolted or otherwise secured to a foundation, and has an opening 2 in its center below the roll pass for collecting dirt and scale removed from the stock as it passes through the machine. On one side of this Opening a pair of concave drive rolls 3 and 4 are arranged,

-while onthe other side, and forming therewith a roll phass, there are a pair of idler rolls 5 and 6. e latter, like the former rolls,

preferably have concave stock-engaging sur-' stock-enga 'ng rolls are all movably supported on ase 1, and so that the roll tables or conveyors 8 and 9 for feeding the stock to and conveyin it from the machine may be fixedly secure totheir supports, the rolls are mounted for movements in such'a way that they may be adjusted for operation on different sizes of stock without varying the elevation of. the lower edge of the roll pass. This renders it unnecessary to vary the elevation of the feeding and runout tables each time a different size of stock is passed through the machine.

The drive rolls 3 and 4 are movably mounted in yoke-shaped bearing supports 11, 12 and 13 secured to base 1 on an inclined side 14 thereof. The two end supports 11 and 13 have ideways 16 and 17 for slidably receiving arings 15 in which the outer ends of the rolls are mounted while center support 12, which is adapted to support the adjacent ends of the two drive rolls,-is of a double form of construction having two bearing-receiving openings 18 and 19 for the reception of the bearing 15 mounted on the adjacent ends of these rolls. These supports are all so shaped, and so mounted on the machine frame, that they rmit the rolls to be positioned in proper alignment with each other, and with their axes in angular relation to both the roll pass and a horizontal plane passed through the base of the machine.

For adjusting rolls 3 and- 4, adjusting screws 21,22, 23 and 24 are fitted into threaded necks 25, 26, 27 and 28 formed at the upper ends of supports 11, 12 and 13, respectively. The lower ends of these screws are swiveled to the upper face of their associated bearings 15, and a bevel gear 29 is slidably splined to the upper end of each. Between screws 21 and 22, and screws 23 and 24, there are mounted, in bearings 33, two shafts 31 and 32, respectively, equipped at their ends with gears 34 which mesh with the gears 29. Each of these shafts is provided with a hand wheel 35 for turning it, and when each is turned both screws associated with it are rotated.

Thus the two ends of each roll may be moved simultaneously.

The idler rolls 5, 6 and 7 are each mounted in a yoke 37, and these yokes are secured to flanged blocks 38, 39 and 41 slidably mounted in grooved supports 42, 43 and 44. The supports are secured to frame 1 on the opposite side of opening 2 to the supports 11, 12 and 13, and each is provided at 1ts upper end with a neck portion 45 carrying a threaded bushing in which adjusting screws 46, 47 and 48, respectively, are fitted. These screws are swiveled at their lower ends to the upper ends of blocks 38, 39 and 41, respectively, and each is equipped at its upper end with a hand wheel 49 for turning it.

In order to prevent the adjusting screws 21, 22, 23 and 24 and 46, 47 and 48 from movmfi of their own accord, and allowing the ro s to get out of adjustment after they have been set for operation upon a particular size of stock, lock nuts or other suitable locking means may be arranged to releasably engage the screws.

In order that the lower edge of the roll pass will always be maintained at a constant elevation, drive roll supports 11, 12 and 13, and idler roll supports 42, 43 and 44 are so disposed that they guide the movement of the rolls along planes extending at difi'erent angles to the horizontal, the angles of the planes being such that the rolls 3 and 4 and the rolls 5 and 6 and 7 move both vertically and horizontally with respect to the roll pass without varying the elevation of the lower edge of. the roll pass. As will be readily appreciated by those skilled in the art, variations in the size of the roll pass may be accomplished in this way through the movement of the rolls in planes at various angles to each other without necessarily varying the line of support of the stock. However, what is now considered to be the preferred form of such an adjustment is that illustrated in the drawings, where the supports are shown as being so arranged that the rolls move bodily in planes 45 to the horizontal. This causes their lines of contact to move at right angles to each other, as indicated in Fig. 4. When the rolls are arranged for adjustment in this manner, not only is the lower edge of the roll pass maintained at a constant level, but also the center line of the pass is maintained in a fixed vertical plane. The advantage of this is that it makes it possible to utilize concave rolls in the feed and runout tables as shown in Fig. 4 to properly guide stock of all sizes into the machine.

For preventing undersized stock inadvertently fed into the rolls from falling through the machine a guide or support 51 is mounted in frame 1 directly below the roll pass and at an elevation substantially the same as that of the feed rolls. While this means is shown here as comprising a bar, rolls or any other suitable type of construction may be employed for such purpose.

Next to mounting both the drive and idler rolls so that they may be adjusted along planes at 45 to the horizontal, probably the most desirable form of roll arrangement is to mount the drive rolls so that they may be adjusted along a plane at 90 to the horizontal and the idler rolls so that they may be adjusted along a plane or line at 26.34/60 to the horizontal as indicated in Fig. 5. When the rolls are mounted for adjustment in this manner, the line .of support of the stock through the machine is maintained at a con stant level as in the former case, but the center of the pass shifts horizontally each time the size of the pass or the stock is changed. Such an arrangement, however, has the advantage due to the vertical movement only of the drive rolls that the driving connections of those rolls may be considerably simplified.

It will be understood that if the planes in which the rolls move are other than 45 to the horizontal, the center of the pass will vary laterally for each size of pass. In such case, feed and runout tables provided with concave rolls would have to be adjustable laterally, or if flat feed rolls were used on the conveyor tables, the stock would have to be guided into the rolls by means of guide bars, such as the check plates 52 shown in Fig. 1, which require adjusting for different sizes of stock.

As will be observed, the drive roll supports, as well as the idler roll supports, are arranged on the frame in such a way that they not only produce a lateral and vertical movement of the rolls when adjusted, but also a movement longitudinally of the pass. The purpose of this is merely to simplify the construction of the mechanism as the machine will function equally as well if the supports are so designed as to eliminate such move ment. Obviously this arrangement of the supports will vary according to line of movem lent of the rolls with respect to the horizonta While no driving means is illustrated for rolls 3 and 4, it is to be understood that they may be driven in any suitable manner, such as by mounting separate driving units at the ends of drive shafts 53 and 54, which are connected to rolls 3 and 4, and so arranging the mountings of the units that they may be adjusted in the same manner as the rolls themselves. Another well known form of drive is a fixed driving unit connected to the drive rolls by means of flexible or universal coupling shafts 55 and 56.

As set forth above, the chief advantage of a machine constructed in accordance with this invention is that it may be adjusted for operation upon different sizes of stock without requiring any adjustment of the conveyor tables employed for feeding the stock into and carrying it away from the machine.

According to the provisions of the patent statutes, I have explained the principle and .mode of operation of my invention, and have illustrated and described what I now consider to be its best embodiment. However, I desire to have it understood that, within the scope of the appended claims the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

l. A cross rolling machine for straightening' round stock, comprising stock-engaging rolls mounted on opposite sides of a roll pass, and means for moving all of said rolls toward and away from a plane passing through the lower edge of said roll pass to vary the size thereof for the reception of diflerent size stock while maintaining the lower edge of the roll pass at a constant elevation.

2. Across rolling machine for straightening round stock, comprising movably-mounted rolls arranged to engage the stock on opposite sides thereof, and means for adjustably moving all of said rolls bodily toward and away from a plane passing through the lower edge of the roll pass formed thereby to vary the size of said pass for working upon different sizes of stock, said adjusting means being adapted to so effect the movement of the oppositely disposed rolls toward and away from each other and said plane as to maintain the line of support of the stock through the machine at a constant level for all sizes of stock.

3. A cross rolling machine for straightening round stock, comprising movably-mounted rolls arranged to engage the stock on opposite sides thereof, and means for adjustably moving all of said rolls bodily at an angle to a plane passing through the lower edge of a roll pass formed thereby to vary the size of said pass for working upon different sizes of stock, said adjusting means being adapted to so effect the movement of the oppositely disposed rolls toward and away from each other and said plane as to maintain the line of support of the stock through the machine at a constant level and the center lines of the roll pass in a single vertical plane for all sizes of stock.

4. A cross rolling machine for straightening round stock, comprisin a plurality of spaced movably-mounted griven rolls arranged to form one side of a roll pass and adapted when actuated to both rotate the stock and advance it through the machine,

idler rolls arranged to form the other side of the roll pass and to contact with the stock at points opposite to the driven rolls, a movably-mounted idler straightening roll between adjacent pairs of said rolls, and means for moving each of said rolls toward and away from the center of the roll pass to vary its size while maintainin the line of su port of the stock at constant evel for all a justments.

5. A cross rolling machine for straightening round stock, comprising a plurality of spaced movably-mounted driven rolls arranged to form one side of a roll pass and ada ted when actuated to both rotate the stoc and advance it through the machine, idler rolls arranged to form the other side of the pass and to contact with the stock at points opposite to the driven rolls, a movably-mounted idler straightening roll between adjacent pairs of said rolls, and adjusting means for moving each of said rolls towar and away from the center of the roll pass to vary the size of the pass while maintaining the line of support of the stock in the machine at a constant level and the center line of the pass in a single vertical plane for all 4 adjustments.

6. A cross rolling machine for straightening round stock, comprising a plurality of spaced movably-mounted driven rolls having concave faces, idler rolls having concave faces and arranged to engage the stock at points opposite to said driven rolls, a movably mounted idler straightening roll between adjacent pairs of said cooperating driven and idler rolls, and means for moving each of said rolls toward and away from a horizontal plane to vary the size of the roll pass while maintaining the line of stock support through the machine at a constant elevation for all adjustments.

7. A cross rolling machlne for straightening round stock, comprising a plurality of.

spaced driven rolls arranged for movement in a lane at 45 to the horizontal, cooperating ldler rolls arranged to form with the driven rolls a variable roll pass and to engage the stock at points opposite to said driven rolls, an idler stock-engaging roll arranged between adjacent pairs of said coo crating driven and idler rolls, and means or movingeach of said idler rolls in a plane at right angles to that of the movement of said driven rolls to vary the size of the roll pass while maintaining its lower edge at a constant level and its.center line in a single vertical plane for all adjustments of the rolls.

8. A cross rolling machine for straightening round stock, comprising a machine frame, two spaced driven stock-engaging rolls, adjustable bearings mounted in said frame for supporting the two ends of each of said rolls, two idler stock-engaging rolls cooperating with said driven rolls and forming therewith a variable roll pass for engaging the stock at points diametrically opposite to said driven rolls, an idler stock-engaging roll midway between said pairs of cooperating driven and idler rolls, adjustable bearings for each of said idler rolls, means for adjusting said idler rolls, and means for simultaneously ad- In testimony whereof I sign In name.

AUGUST P. D SCHER. 

